Fail-safe actuator with two permanent magnets

Details Fail-safe actuator with two permanent magnets Fail-safe actuator with two permanent magnets

H - Electricity

02

K

H02K 41/02 (2006.01) F16K 31/06 (2006.01)

Patent

CA 2195696

An electromagnetic actuator has two permanent magnets arranged along their polar axes, with the proximal poles having same polarity. An electromagnet surrounds the two permanent magnets and, when energized, overrides the repulsion between the proximal poles and moves one permanent magnet toward the other fixed magnet. Should the electromagnet fail, the actuator reverts to the unactuated position without need of a spring, gravity and so forth.

Actionneur électromagnétique comprenant deux aimants permanents placés le long de leur axe polaire, avec leurs pôles proximaux ayant la même polarité. Un électro-aimant entoure les deux aimants permanents et, lorsque excité, neutralise l'effet de répulsion entre les pôles proximaux et déplace un aimant permanent vers l'autre aimant fixe. Si l'électro-aimant ne fonctionne pas, l'actionneur retourne à la position non actionnée sans le besoin d'un ressort, sans faire appel à la gravité ou à toute autre forme d'aide.

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